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Bulletin of Scientific Contribution : Geology

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Published by Universitas Padjadjaran

ISSN : 16934873 EISSN : 2541514X DOI : doi.org/10.24198/bsc%20geology.v18i1

Core Subject : Science, Social, Engineering,

Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science

BSC Geology adalah jurnal yang dikelola oleh Fakultas Teknik Geologi Universitas Padjadjaran,terbit 3 kali dalam setahun (April, Agustus, dan Desember), yang menerbitkan karya tulis ilmiah dalam bidang kebumian terutama yang berkaitan dengan geologi seperti : Petrologi Paleontologi Geomorfologi Stratigrafi Geologi Dinamik Geologi Lingkungan dan Hidrogeologi Geologi Teknik Geokimia Geofisika Sedimentologi. Setiap artikel yang akan diterbitkan adalah bersifat tanpa biaya (no processing charges dan no submission charges). Dewan redaksi dan penerbit tidak pernah meminta bayaran untuk penerbitan pada jurnal ini. Tujuan dari jurnal ini adalah untuk memperkaya pengetahuan dan informasi tentang ilmu kebumian dan dapat dimanfaatkan untuk kemaslahatan bersama.

Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi

Articles 8 Documents

Search results for , issue "Vol 13, No 2 (2015): Bulletin of Scientific Contribution" : 8 Documents clear

KERAPATAN KELURUSAN SUNGAI DI WILAYAH MAJALENGKA DAN HUBUNGANNYA DENGAN VARIABEL MEKANIKA TANAH: SUDUT GESER-DALAM Zakaria, Zufialdi; Sophian, Irvan
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Areas of the research include the role in The Eastern Zone of Bogor Basin. In this research are Research areas included in the Eastern zone Bogor Basin. In this research are discussed: 1) The role of tectonic and drainage lineament on Tertiary and Quaternary rocks in the study area; 2) The role of soil variables that are part of the parent rock material. The method used is a probabilistic analysis involving friction angle and lineament densty. The results showed: 1) The absence of differences in the direction of linemament drainage patterns on Tertiary and Quaternary rocks, indicating the influence of the deformation of the same, namely the upligt, the two rocks together to experience the rapture; 2) The density llinemanet associated with one variable, namely internal friction angle (phi). Internal friction angle (phi) decreases with increasing density lineament.

PENTINGNYA IDENTIFIKASI PATAHAN AKTIF DALAM UPAYA MITIGASI BENCANA DI KAWASAN PENDIDIKAN JATINANGOR, JAWA BARAT Muslim, Dicky; Endyana, Cipta
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

West Java region is tectonically active area because it is close to the subduction zone between the Eurasian continental plate with the Indo-Australian oceanic plate. This led to the high intensity of the presence of active faults, either already identified or not. Jatinangor areas as education city is now growing very rapidly filled by a variety of campus facilities. There are four major colleges (UNPAD, ITB, IKOPIN, STPDN) and various supporting infrastructure. With the increasing number of population and limited land can be built, the various geological resources in this area should be managed as well as possible, including land resources as part of the various geological resource potential that can be developed to meet the needs and desires of humans. The existence of various lineament of morphology around the area Jatinangor considered as a continuation of the path which uncategorized Lembang Fault is active. A number of earthquake ever recorded in the past has the epicenter around this fault. This study aims to explain the importance of the identification of active faults in disaster mitigation efforts on the limited land resources but must meet the needs of the growing population. The results showed that there are a number of alignment around G. Manglayang that can be associated with kemenrusan Lembang Fault. At the southern foot of Mt. Manglayang spread a general lineament trending north-south and northwest-southeast which is straightness lembahan and hills. In geomorphological generally show the characteristics of active faults that are vulnerable to earthquake activity. This will limit the different characteristics of land that can be built because it must take into account the values of dynamic bearing capacity as the earthquake disaster mitigation efforts in the future. In addition, it is also necessary mitigation efforts related to disaster education to all stakeholders in the area of research.

LIMESTONE BEDS DEVELOPMENT OF THE MIDDLE–LATE MIOCENE JATILUHUR FORMATION IN THE BOGOR TROUGH, WEST JAVA -, Abdurrokhim; -, Hendarmawan
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The sedimentary rock succession of the Jatiluhur Formation comprises of mixed siliciclastic and carbonate sedimentary rocks. Two intervals of limestone beds are observed along the Cipamingkis River, on the lower and upper part of succession. Limestone in the lower part is typified by coarse-grained slump-scar-fill deposits that deposited during middle Miocene. It is largely consisting of skeletal fragments that have been delivered from the shallow marine carbonate reef of the Upper Cibulakan Formation during relative sea level fall. The punctuated mixing of siliciclastic and carbonate detritus took place during the middle Miocene in the Bogor Trough. Limestone beds in the upper part are characterized by thick- to very thick bedded limestone intercalated with thin- to very thin laminated siltstone, claystone, and fine-grained sandstone, which are interpreted to have been deposited in the shelf margin environment during late Miocene. The limestone consists of various characteristic of packstone, grainstone, rudstone and boundstone. Carbonate reef of the Klapanunggal Formation is interpreted to be the source of thick-bedded limestone in the upper part. The facies mixing of siliciclastic and carbonate sediments occurred in the middle part of Jatiluhur Formation during the late Miocene.

PERAN TATA GUNA LAHAN TERHADAP DISTRIBUSI TINGKAT KERAWANAN EROSI DI KAWASAN CILETUH JAWA BARAT Sulaksana, Nana; Sjafrudin, Achmad; Sukiyah, Emi; Raditya, Pradnya P.; Abdulah, Fikri; Setiyanto, Puguh
Bulletin of Scientific Contribution: GEOLOGY Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Ciletuh located in Ciemas district, Sukabumi, West Java is known by its geological diversity (geodiversity). This area is located at the southwestern of Java Island and directly adjacent to the Indian Ocean. Ciletuh is a very attractive tourist visits area and deserve to be visited. This area is planned to be a National Geopark area and Global Geopark Network in 2016. This will certainly have an impact on the change of land use in the next few years. The change of land use will affect indirectly to the distribution of erosion rate in research area. The higher of land use changes, the higher of erosion rate that can cause environmental quality degradation. This research aims to reveal the land use changes can affect the level of of vulnerability to erosion in Ciletuh. This research method uses laboratory and studio analysis. Remote sensing analysis is used to delineate land use. The distribution rate of erosion in research area can be known through erosion calculation formula. Based on delineation of land use, Ciletuh have areas of land cover consisting of 6.666.104 m2 (9,7%) plantation, 10.444.567 m2 (15,2%) forests, 3.252.843 m2 (4,7%) settlements, 82.264 m2 (0,1%) swamps, 22.863.874 m2 (33,3%) paddy fields, 19.474.346 m2 (28,37%) bushes, 2.057.689 m2 (2,9%) vacant lands, and 3.788.699 m2 (5,5%) moors area. The result of early research identification indicates that the level of vulnerability to erosion associated with the greatest land cover is moor and vacant lands.

POTENSI GEOWISATA DI KAWASAN TELUK CILETUH, SUKABUMI, JAWA BARAT Hardiyono, Adi; Syafri, Ildrem; Rosana, Mega F.; Yuningsih, Euis Y.; -, Herry; Andriany, Suci Sarah
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Ciletuh be local Geopark since August 2014, and now towards preparing to become a National Geopark. This geopark is proposed by the government of Sukabumi in 2014. Remains of the geology in this geopark is the emergence of ophiolite complex as a result of fossil tectonic subduction between the Eurasian plate and the Indo-Australian Plate at the age cretasius. Geomorphology tectonic activity form the shape known as the Ciletuh amphitheater, and also the unique shapes result of water erosion that formed the rocks that looks into unique shapes like dragon-stone, frogs-rock, buffalo-stone. etc. There is also the conservation of green turtles and other wild animals such as sea eagles, panthers also conservation Raflesia flowers, Cantigi and mangrove forests to support geopark Ciletuh. Geopark Ciletuh can be divided into four complexes, namely Geoarea Tamanjaya, Geoarea Ciwaru-Mount Rhinos, Geoarea Citisuk-Cikepuh and Geoarea Citirem Ujunggenteng.Some programs geotrek made to visit geoarea either road, or by sea with a boat, also made supporting facilities such as hotels, homestays, local guides and signs.

DEBIT ALIRAN (WATER YIELD) SUB-DAS CIGUMENTONG DAN CIMULU SUB-DAS CITARIK BAGIAN PALING HULU Haryanto, Edi Tri; Nur, Andi Agus; Haryanto, Iyan; Yuniardi, Yuyun
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Cigumentong and Cimulu sub-watersheds are growing at vokanik denudasional landform with geological formations of undeferienciated old volcanic product consists of tuff , breccia and lava of the uppermost of Citarik Sub-Catchment . Based on the order system according to Strahlaar both river is a river -order 4 , with the land cover of relatively dense forest vegetation with an area of 552 Ha respectively and 606 Ha . This study aims to investigate the flow discharge characteristics of the two rivers by measuring daily and daily rainfall during the period 20 December 2014 through to March 2015, or for 71 days . The research result is fluctuations in flow discharge rate between the River Cigumentong and Cimulu tend to be similar . Inlfiltration coefficient of Cimulu sub-watersheed was slightly larger (0.54)than that was Cigumentong sub-watersheed (0.53), with the infiltration thickness of 695 mm for Cimulu and 577 mm for Cigumentong. Runoff coefficient Cimulu sub-watersheed is larger (0.44) than Cigumentong (0.37) .

LITOSTRATIGRAFI CEKUNGAN OMBILIN DALAM KERANGKA TECTONO-SEDIMENTATION RIFT BASIN Mulyana, Budi; Gani, Reza Mochamad Ganjar
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

During Tertiary, the sedimentation model in Ombilin Basin, West Sumatra, was strongly influenced by tectonisme. It is indicated by characteristic and composition of the rock, and distribution pattern for each formation. In general, it can be decided into two main groups according to the age of rocks, which associated with the tectono-sedimentation rift basin. Brani, Sangkarewang, Sawahlunto and Sawahtambang Formations were deposited in terrestrial to transition zone during syn-rift phase. Meanwhile, Ombilin and Ranau Formations, which is dominated by volcanic deposits, were formed for the period of post-rift phase indicated by marine influence has existed.

IDENTIFIKASI STRUKTUR GEOLOGI BERDASARKAN ASPEK MORFOLOGI, STRATIGRAFI, POLA JURUS LAPISAN BATUAN DAN SEBARAN BATUAN : STUDI KASUS DAERAH BANTARUJEG-MAJALENGKA, PROVINSI JAWA BARAT Haryanto, Iyan; -, Nurdradjat; Saputra, Irdanto
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The study is located at Bantarujeg, Majalengka, West Java where tertiary sedimentary rocks are exposed. The depositional environment is concluded as shallow marine – deep water. In a present day, the sedimentary rocks are deformed and create a steep hills extending from west – east of the study area as a result of fault and folding processes. In some of the study area, deformed sedimentary rocks feature is resulted by sedimentation processes called slump. Various deformation model and interpretation on study area is often confuse geological history interpretation of study area. The main cause of folding in the study area may be adjacent to sedmentation processes or tectonic processes.The study is based on structural interpretation on topography map, drainage pattern, and digital elevation model analysis (DEM). Field observation is conducted to measure structural feature and identify sedimentology and morphology aspects.Structural geology Bantarujeg is expressed by steep hills morphology extending from west – east. The morphology is controlled by rock strike with rock dip measured from 30o-60o. In the middle of the depression (valley), layer dip generally above 40o shows the area is a result of compression and related to reverse fault. Local fold and drag fold is also founded on the reverse fault zone and in other location slump structure and local drag fold also identified. In general, the study area is a result of compression tectonic regime creating fold and thrust belt followed by tear fault deformation.

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Muhammad Kurniawan Alfadli

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Muhammad Kurniawan Alfadli

Contact Email m.kurniawan@unpad.ac.id

Phone +6285669298592

Journal Mail Official bsc.ftg@unpad.ac.id

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Location Kota bandung, Jawa barat INDONESIA

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Contact Name
Muhammad Kurniawan Alfadli

Contact Email
m.kurniawan@unpad.ac.id

Phone
+6285669298592

Journal Mail Official
bsc.ftg@unpad.ac.id

Editorial Address
-

Location
Kota bandung,

Jawa barat

INDONESIA